Not only is there a video on youtube from CD Projekt Red explaining the first game but I believe that same video is also under the games extras menu so there's that as well. I never even heard of The Witcher until videos for this 360 version starting coming out and I never once felt lost so you should be good.

Not only is there a video on youtube from CD Projekt Red explaining the first game but I believe that same video is also under the games extras menu so there's that as well. I never even heard of The Witcher until videos for this 360 version starting coming out and I never once felt lost so you should be good.